* {
    margin: 0;
    padding: 0;
}

.tab {
    width: 70%;
    margin: 0 auto;
    /* border: 1px solid red; */
}

.tab_top {
    width: 100%;
    display: block;
    height: 120px;
}

.tab_top li {
    /* width: 500px; */
    float: left;
    padding-bottom: 15px;
    margin: 20px;
    font-size: 26px;
    overflow: hidden;
}

.bg {
    border-bottom: 3px solid #000;
}

.item {
    width: 90%;
    margin: 0px auto;
}

.item div {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.aw {
    display: block;
}

.aw img {
    width: 90%;
}

.num1 {
    width: 100%;
}

/* .item img {
    width: 28%;
} */

.item img:hover {
    box-shadow: 3px 3px 5px 5px rgba(0, 0, 0, .3);
}

.ye {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 0 auto;
}

.ye div {
    width: 30px;
    height: 30px;
    line-height: 30px;
    border-radius: 30%;
    text-align: center;
    border: 1px solid;
    margin: 10px;
    margin-bottom: 50px;
}

/* .ye div:first-child {
    border-color: blue;
    color: blue;
} */

.blue {
    border: 1px solid red;
    color: blue;
}

@media (max-width:1024px) {
    .item img {
        width: 30%;
    }

    .item {
        width: 90%;
        /* border: 1px solid red; */
    }

    .tab_top li {
        font-size: 20px;
    }

    .tab {
        width: 100%;
    }

    .tab_top {
        width: 100%;
        display: block;
        height: 100px;
    }
}